Exchange 2010 on LTM v11
I am deploying load balancing for Exchange 2010, using LTM v11 and I am having issues with the RPC service. In a nutshell, when I start the Outlook client and try to configure a profile, I get the following error:
" The action could not be completed. The connection to the Microsoft Exchange Server is not available. Outlook must be online to complete this action"
A tcpdump shows this error returning from the server:
"DCERP Bind_ack: call_id:1, NTLMSSP_CHALLENGE Provide rejection, reason: Abstract syntax not supported"
However, a direct connection to the pool member works fine.
I am using the default iApp to deploy OWA, ActiveSync, Autodiscover, RPC, POP and SMTP. I have a combined VIP for the main services and separate VIPs for RPC, POP and SMTP. I have 3 VIPs for RPC - basic port 135 and two static ports for mapi and address book virtual.
Following the implementation guidelines, I created new LAN/WAN profiles changing the timeout to 7200 and configure the option match across services for the RPC VS.
Through torubleshooting, I also noticed on the tcpdumps the server is passing the pool member's IP address and FQDN back to the client. I am taking this could rather be an issue on the Exchange configuration.
Has anyone seen this issue before?